Week-6 Challenge: EV Drivetrain

1.  Which types of power converter circuits are employed in electric and hybrid electric vehicle?   

2.  An Electric Vehicle's powertrain with 72V battery pack in shown in the diagram below. The duty ratio for acceleration operation is 'd1' and for the braking operation the duty ratio is 'd2'.

The other parameters of the  electric vehicle is given below,

       Motor and Controller Parameters:

                     Rated Armature voltage= 72 V

                    Rated armature current= 400 A

                    Ra= 0.5Ω, KΦ= 0.7 Volt second

                    Chopper Switching frequency= 400 Hz

        The vehicle speed-torque characteristics are given by the below equation

        What is EV steady state speed if duty cycle is 70%?

3. Develop a mathematical model of a DC Motor for the below equation using Simulink.   

      $\omega$=   V/K$\varphi$ -Ra/K$\varphi$^2    .T

 4.   Refer to the blog on below topic: 

            Induction Versus DC brushless motors by Wally Rippel, Tesla

            Explain in brief about author’s perspective. 

     AIM :

               To create types of power converter circuits and electric and hybrid vechile, 72V bettery pack diagram below. and DC motor using simuling matlab.

1.  Which types of power converter circuits are employed in electric and hybrid electric vehicle?   

      Power electronics is the electrical power of the high voltage and current to delived. this power converter is the  using to convert the power, AC to DC converter and DC to AC inverter function is power converter.

   in converter is a DC to DC converter, category of power conver DC voltage level to anothe, by input energy to create a output different voltage.

   power converter types is :  

    1. diode rectifier

    2. AC to DC converter using controlled rectifier

    3. DC to DC converter using DC choppre 

    4. AC to ac converter using AC voltagr regulator

    5. DC to Ac converter using inverter.

    6. static switchs. 

AC to DC converter using controlled rectifier :

          this is the diode rectifer using AC to DC converter, the basic type of the full wave rectifer and half wave rectifer and bridge rectifer. 

   half wave rectifier is sine wave AC wave form convert in to DC pulse wave of cut the negitive signal and AC signal leaving pulses of DC.  full wave rectifier is AC sine wave frome convert in to full wave puls singnal DC converted.

DC to DC converter using DC choppre  :

    The converters that convert the dc signal of fixed frequency present at the input into a variable dc signal at the output are also known as choppers     

DC to Ac converter using inverter :

  this circute is deign to the DC singnal to AC signal this function is inverters. inverter is inpute is fixed DC voltage that can be battery power convert in to variable AC voltage signal of sine wave. this fabriation is MOSFETs, IGBT, GTO circuts is used.

AC to ac converter using AC voltagr regulator

   this AC to AC converter is fixed frequency to a variable ac output voltage. this is using A cycloconverters this circuit is change to AC fixed voltage supply of single frequency into an ac output voltage of variable voltage as well as different frequecy.

     2.  An Electric Vehicle's powertrain with 72V battery pack in shown in the diagram below. The duty ratio for acceleration operation is 'd1' and for the braking operation the duty ratio is 'd2'.

The other parameters of the  electric vehicle is given below,

       Motor and Controller Parameters:

                     Rated Armature voltage= 72 V

                    Rated armature current= 400 A

                    Ra= 0.5Ω, KΦ= 0.7 Volt second

                    Chopper Switching frequency= 400 Hz

        The vehicle speed-torque characteristics are given by the below equation

        What is EV steady state speed if duty cycle is 70%?

MATLAB Simulation :

     this calculate function od EV is study state is calculated.

  Output wave of simulation :

    this outpu is torque N-m  and speed(rad/s) of

3. Develop a mathematical model of a DC Motor for the below equation using Simulink.   

      $\omega$=   V/K$\varphi$ -Ra/K$\varphi$^2    .T

       the mathematical module of a DC motor is the dray and simulation of matlab 

           Ra= 0.5Ω, KΦ= 0.7 Volt second

           Chopper Switching frequency= 400 Hz

mathematical model of a DC Motor :

   output wave result of simulink in this equation :

4.   Refer to the blog on below topic: 

            Induction Versus DC brushless motors by Wally Rippel, Tesla

            Explain in brief about author’s perspective. 

         DC burushless motors by wally rippel tesla is a long time proponent of electric vechiles. 

  the aero vironment ,where he helped develop the EV1 ecectric car.

      brushless or induction 

    back in the 1990s all of the electric vechiles except one were power by DC burshless drive. 

today all the hybrides are powered by DC brushless drives,  first vechil of general motor EV-1. the AC propulsion vechiles.of tesla roadster.

     both DC brushless and induction drives use motors having similar stators. both drive use 3- phase modulating inverters. the only differences are the rotors and the inverter controls.

         basic DC brushless motor :

          the basic DC brushless motor is a motor convert supplied electrical energy into mechanical energy. various types of motor are in common use. Among these, brushless DC motors (BLDC).

     CONCULATION :

                 To conculat all the EVs and HEs powre converter circuits to simulated of simuling using matlab to all challange

complited.